1. Andreasen, N. C. (1982). Negative symptoms in schizophrenia: Definition and reliability. Archives of General Psychiatry, 39(7), 784–788.
2. Appleby, L., Kapur, N., Shaw, J., Turnbull, P., Hunt, I., Ibrahim, S., …, Daud, H. (2021). The national confidential inquiry into suicide and safety in mental health. Annual Report: England, Northern Ireland, Scotland and Wales.
3. Arndt, S., Alliger, R. J., & Andreasen, N. C. (1991). The distinction of positive and negative symptoms. The British Journal of Psychiatry, 158(3), 317–322.
4. Badcock, J. C., Adery, L. H., & Park, S. (2020). Loneliness in psychosis: A practical review and critique for clinicians. Clinical Psychology: Science and Practice, 27(4), e12345.
5. Bale, C., & Archer, J. (2013). Self-perceived attractiveness, romantic desirability and self-esteem: A mating sociometer perspective. Evolutionary Psychology, 11(1), 147470491301100107.